Kelly Anne-Maree, Weldon Daragh, Tsang Anna Y L, Graham Colin A
Joseph Epstein Centre for Emergency Medicine Research, Western Hospital, Footscray, and The University of Melbourne, Australia.
Respir Med. 2006 Aug;100(8):1356-9. doi: 10.1016/j.rmed.2005.11.022. Epub 2006 Jan 6.
To compare the estimated size of spontaneous pneumothoraces using the established Rhea inter-pleural distances method with the CT-derived Collins method.
Adult patients with spontaneous pneumothorax treated conservatively were identified from the ED databases. X-rays were reviewed independently by two researchers and measured according to the methods described by Rhea and Collins. Estimates of size derived by the two methods were compared using bias plot analysis techniques.
A total of 156 X-rays in 57 patients were identified. A total of 82% were male with a median age of 22 years. Pneumothoraces varied in size from 4% to 88%. The average difference between methods was 4% (Collins method estimating larger size) with 95% limits of agreement -3.8% to 11.7%. Agreement was very close for small pneumothoraces but deteriorated with increasing pneumothorax size (Collins methods estimated larger pneumothorax size).
The Rhea method for estimating pneumothorax size is acceptably accurate for smaller pneumothoraces but may significantly under-estimate the size of larger pneumothoraces.
采用已确立的瑞亚胸膜间距离法与CT衍生的柯林斯法比较自发性气胸的估计大小。
从急诊科数据库中识别出接受保守治疗的成年自发性气胸患者。两名研究人员独立复查X线片，并根据瑞亚和柯林斯描述的方法进行测量。使用偏差图分析技术比较两种方法得出的大小估计值。
共识别出57例患者的156张X线片。其中82%为男性，中位年龄为22岁。气胸大小从4%到88%不等。两种方法的平均差异为4%（柯林斯法估计的尺寸更大），95%一致性界限为-3.8%至11.7%。对于小气胸，一致性非常接近，但随着气胸大小增加而变差（柯林斯法估计的气胸尺寸更大）。
瑞亚法估计气胸大小对于较小的气胸具有可接受的准确性，但可能会显著低估较大气胸的大小。
